Necessary equipment to run telephony?

Question

Telephony

Good afternoon.
Misters telephonists help to answer a following question.
The new facility has a Maxicom MXM500 PBX and an Eltex TAU-16.IP gateway (16 FXS) plus 50 ports with analog phones in the future. Do you need Maksikom at all in this case, or does Eltex already have PBX functionality sufficient for telephony to function?
The question is possibly stupid. The networker himself, never worked with telephony, but there was such a task. If there is not enough information, ask questions, I will write in more detail.
Thank you all in advance.

Answer 1

Despite the small number of descriptions for the TK (how the lines come to you, what functionality is required from telephony is not clear), most likely the Eltex functionality will not be enough. And why do you need Eltex? Why not get by with Maxicom?